<template>
    <div>
        <el-form ref="loginForm" :rules="rules"
                 v-loading ="loading"
                 element-loading-text="正在登陆...."
                 element-loading-spinner="el-icon-loading"
                 element-loading-background="rgba(0,0,0,0.8)"
                 :model="loginForm"
                 class="loginContainer">
            <h3 class="loginTitle">系统登录</h3>
            <el-form-item prop="username">
                <el-input type="text" auto-complete="false" v-model="loginForm.username" placeholder="请输入用户名"></el-input>
            </el-form-item>
            <el-form-item prop="password">
                <el-input type="password" auto-complete="false" v-model="loginForm.password" placeholder="请输入密码"></el-input>
            </el-form-item>
            <el-form-item prop="code">
                <el-input type="text" auto-complete="false" v-model="loginForm.code" placeholder="点击图片更换验证码" style="width: 250px;margin-right: 5px"></el-input>

                <img :src="captchaUrl" @click="updateCaptcha">
            </el-form-item>
            <el-button type="primary" style="width: 100%" @click="submitLogin">登录</el-button>
        </el-form>
    </div>
</template>

<script>


    export default {
        name: "Login",
        data(){
            return{
                captchaUrl:'/captcha?time='+ new Date(),
                loginForm:{
                    username:'admin',
                    password:'456',
                    code:''
                },
                loading:false,
                rules: {
                    username: [{required:true,message:'请输入用户名',trigger:'blur'}],
                    password: [{required:true,message:'请输入密码',trigger:'blur'}],
                    code:[{required:true,message:'请输入验证码',trigger:'blur'}]
                }
            }
        },
        methods:{
            updateCaptcha(){
                this.captchaUrl = '/captcha?time='+ new Date();
            },
            submitLogin(){
                this.$refs.loginForm.validate((valid) => {
                    if (valid) {
                        this.loading=true;

                       this.postRequest('/login',this.loginForm).then(resp=>{
                            if(resp){
                                this.loading=false;
                                //存储用户token
                                const tokenStr = resp.obj.tokenHead+resp.obj.token;
                                window.sessionStorage.setItem('tokenStr',tokenStr);
                                //页面跳转
                                let path =this.$route.query.redirect;
                                this.$router.replace((path=='/'||path==undefined?'/home':path))
                            }
                        }
                      
                        )
                        this.loading=false;
                    } else {
                        this.$message({
                            showClose: true,
                            message: '请输入所有信息',
                            type: 'error'
                        });
                        return false;
                    }
                });
            }
        }
    }
</script>

<style>
.loginContainer{
    border-radius: 15px;
    background-clip: padding-box ;
    margin: 180px auto;
    width: 350px;
    padding: 15px 35px 15px 35px;
    background: #fff;
    border: 1px solid #eaeaea;
    box-shadow: 0 0 25px #cac6c6;
}
.loginTitle{
    margin: 0px auto 40px auto;
    text-align: center;
}
    .el-form-item__content{
        display:flex;
        align-items: center;
    }
</style>